weston



(No Model.) 4 Sheets-Sheet 1.

E. WESTON.

ELECTRIC ARC LAMP. Nd. 266,240. Patented Oct. 17, 1882.

Inventor:

(N0 Model.) 4 Sheets-Sheet 2.

E. WESTON.

ELECTRIC ARC LAMP.

No. 266,240. Patented Oct. 17, 1882 Inventor? W 60422 81 Ma) w (No Model.) 4 Sheets-Sheet 3.

E. WESTON.

ELECTRIC ABC LAMP. .No. 266,240. Patented Oct. 17, 1882.

(N 0 Mode1.) 4 Sheets-Sheet 4.

E. WESTON.

ELECTRIC ARC LAMP. No. 266,240. Patented Oct. 17, 1882.

UNITED STATES PATENT OFFICE.

EDWARD WESTON, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEWV YORK, N. Y.

ELECTRIC-ARC LAMP.

SPECIFICATION formingpart of Letters Patent No. 266,240, dated October 17, 1882,

Application filedJuly 17, 1882. (No model.)

To all whom it may concern: l to raise the armature, and thereby effect the Be it known that I, EDWARD WESTON, a requisite shitting of current. The presentinsubject of the Queen of Great Britain, residvention therefore differs from that described ingii1Newarl ,Essex county,NewJer se v,have in my previous case mainly in this respect, 5 5 invented certain new and useful Improvements that by the above-described or any equivalent in Electric-Arc Lamps, of which the following means one set of carbons is held positlvelyout is a specification, reference being had to the of action until the otheris consumed to apredrawings accompanying and forming a part of determined point, while in the other case the the same. position alone of the shitting devices main- 6o 10 In another application filed by me I have tained the second set of carbons out of conshown and described an electric lamp containtact, from which it was a possible result that ingasingle set of feed-regulating magnets,two when the lamps were knocked or jarred the pairs or sets of carbon pencils, and independsecond set might be permitted to drop together entt'eeding devices connected therewitl1,which before the tirst were consumed. by the consumption of the carbons are brought The invention, together with other improvesuccessively under the controlling influence of ments in the details of construction, will be dethe aforesaid magnets. The instrumentalities scribed by reference tothe accom panying drawby means of which one set of the feeding deings, in whichvices in the lamp referred to was brought on Figures 1 and 2 are views of the lamp from 2o der the control of the magnets after the other opposite sides, a portion of the base-plate in had operated for a predetermined time coneach figure being cut away to exhibit the arsisted of a pivoted armature-lever which was rangement ot' the parts constituting the shil'tadapted to be shifted to raise the free end of ing mechanism. Fig. 3 is a plan view of the either of two clamping or clutch levers, and an lamp; and Fig. 4 is a plan view of the base 25 independent electro-magnet for shifting the and lifting mechanism, the upper portions of said lever. In conjunction with the upper or the frame being shown in section. gravilating carbon-carrier of that set of car- The lamp mechanism proper of the lamp is bons thatwas designed to burn last, a weighted substantially the same as that heretofore used catch was used to sustain the weight of the by me and described in my application above 30 said carrier and its carbon. This catch was referred to. It consists of a bipolar magnet, tripped by the shifting of the armature-lever, D D, supported by standard A and wound due to the energizing ot' the independent magwith two sets of coils in opposite directions, net, so that the second set of carbons was alone in the main or lamp circuit, the other in a lowed to drop together and establish the arc. shunt about the lamp, an armature, l), in 8 5 Over these devices my present invention is face of said magnets, and supported by flat an improvement, the novel portions of the springs c, secured to a standard. B, a tension mechanism composing the same being substandevice for regulating the armature, and a dashtially as follows: In lieu of the pivoted armapot, P, for precluding sudden movement or ture-lever used in the previous instance, I emvibration in the moving parts. I would state, 4o ploy a pivoted lever, with which a spring is however, that this particular form of lamp is connected orotherwi'se used, which has a tendgiven here only in illustration, and that many ency to draw it over in a direction which will others may be employed to equal advantage. throw the set of carbons that have been con- Connected by links d to the armature l), orto sumed out of circuit and bring the other set a bar carried thereby, are two clamping plates 5 5 into action. Hinged to this lever is a pivoted or bars, E E, having screw-stops c passing catch that is employed to sustain the weight through their free ends. It It are thetwo upof one carbon-carrier. A pivoted armature per-carbon holders, passing through and con constituting or provided with a catch is cmtrolled by the clamps E E. ployed for holding the pivoted lever against O is a light bar of metal, pivoted tothe base I00 50 the force of the spring, and an electro-magnet F at a point about equidistant from the two in an independent circuit is placed in position carbon-carriers It It, and to one side of the same. The bar or lever G is formed with bev eled or wedgeshaped enlargements 72, it near its ends, or at the points where the ends of the clamps E E rest. A spring, S, of any proper kind, bears upon or is otherwise connected to the bar U, imparting to it a tendency to raise the end of clamp E and lower that of clamp E.

G is a sott-iron armature pivoted to the standard of a small magnet, H,- and. carries a catch, g, that engages with an arm, c,on bar 0, when the latter is drawn over against the force of the spring S. Magnet M is in a circuit independent of the lamp or closed shunt-circuit,

. and which is closed by a ring or collar, H, on

one ot' the carbon-carriers, that in descending comes into contact with an insulated plate, K, to which the wire W, forming the circuit of magnet M, is connected.

L is a pivoted hook orcatch, passing through an opening in the base F, and connected by hinged link L with the bar (J. On carboncarrier 1% is a iiange or ring, N, with which the catch L engages. An adjustable stop, 0, is used to limit the movement of the bar 0.

The purpose and mode of operation of the devices thus described are as follows: The lamps being supplied with carbons, the carrier It is raised and the catch L caused to engage with the flange N. By this means the barO is brought to the position where it is retained by the engagement of catch or hook g with the arm 0. Under theseconditions the free end of clamp E will be in its lowest position, so that the normal movement of the armature D will cause said clamp to raise, lower, and feed the carbon-carrierlt. Clamp E, on the other hand, owing to the tact that its end is raised by the wedge-shaped enlargement It, is not capable of gripping the holder It. Only the first set of carbons will therefore be in circuit. and they will continue to burn until the stop H comes into contact with plate K. WVhcn this occurs magnet M is energized, its armature attracted, and bar 0 set free, by which the catch L is withdrawn from the flange N, the end of clamp E lowered, and the second set of carbons brought into action. The lamp is readily set from the outside by shifting the projecting catch L to trip the bar 0 at any time. A short pimp, is held in a hole in base F, directly under the armature G, by heads.

For the purpose of holding the carbon-carrier It in any desired position while renewing or adjusting the carbons, I employ a flat springblade or bundle ofstift' wires, (designated by T,) which is held by a post, if, on the under side of the base F, and arranged to press upon the carrier with suflicient force to prevent it from descending by its own weight. A thumbscrew, 0, or any equivalent device formed or provided with a cam, is used to force away the spring T from the carrier 1%.

1. In an electric lamp containing two sets of carbons, the combination, with the electromagnet, of independent feed mechanisms, one for each set of carbons, a pivoted bar adapted to maintain either of said t'eed mechanisms out 8 of operation, a spring for shifting the same, an electro-magnet independent of the teed-magnets, and an armature therefor, arranged to lock or release the pivoted bar, substantially as and for the purpose sett'orth.

2. In an electric lamp containing one set of feed-controlling magnets and two sets of carbons, the combination, with the movable armature, of two independently-connected clutch mechanisms, one for each set of carbons, a pivoted bar adapted to raise the free end of either of the said clutch mechanisms, a spring con nected with the said bar, and an electro-tnagnet and pivoted armature l'or lot-king and releasing the bar, as and for the purpose set 9 forth.

3. In an electric lamp containing one set of feed-controlling magnets and two sets of carbons, the combination, with the movable armature, of two independently-connected clutch 1 mechanisms, one for each set of carbons, a pivoted bar adapted to maintain either of said clutch mechanisms out of operation, a catch hinged to said bar and arranged for sustaining the carrier of the inactive set of carbons, a 1 spring for shifting the pivoted bar, and an electro-magnet and pivoted armature for locking and releasing the same, substantially as set forth.

4. Thecombination,with the spring-shifting 1 bar 0, of a magnet, M, and armature G, placed above the base F, and a pin, 1), extending through the said base and arranged for raising the armature, substantially as described.

5. Inan electric lamp,the combination,with 1 the carbon-carrier, ot a bearing-spring, T, or its equivalent, and a cam for controlling the position of the same, substantially as set forth.

In testimony whereofI have hereunto setmy hand this 7th day of July, 1882.

EDWARD \VESTON.

Witnesses:

W. FRISBY,

UAYMOND F. Bnnnns. 

